| 摘要 |
PURPOSE:To make it possible to easily measure constants of an induction motor for vector control only by the measurement of winding resistance and lock tests. CONSTITUTION:The resistive component R and reactance component X of the combined impedance are determined by lock tests at a frequency of f. Then lock tests are conducted at a frequency of 1/2 of f to obtain the resistive component R' and reactance X'. On the assumption that the constants of an induction motor are not varied due to magnetic saturation, skin effect or the like, the constants of the induction motor, such as exciting inductance Xm, leakage inductance Xsigma and secondary resistance R2, are found from an equivalent circuit. |
